IB/mlx5: Simplify mlx5_ib_destroy_srq

Make use of destroy_srq_kernel() to clear SRQ resouces.

Signed-off-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
diff --git a/drivers/infiniband/hw/mlx5/srq.c b/drivers/infiniband/hw/mlx5/srq.c
index 0aa478b..f1e5845 100644
--- a/drivers/infiniband/hw/mlx5/srq.c
+++ b/drivers/infiniband/hw/mlx5/srq.c
@@ -390,9 +390,7 @@
 		mlx5_ib_db_unmap_user(to_mucontext(srq->uobject->context), &msrq->db);
 		ib_umem_release(msrq->umem);
 	} else {
-		kfree(msrq->wrid);
-		mlx5_buf_free(&dev->mdev, &msrq->buf);
-		mlx5_db_free(&dev->mdev, &msrq->db);
+		destroy_srq_kernel(dev, msrq);
 	}
 
 	kfree(srq);